modelValveLinear
Valve for water/steam flows with linear pressure drop
Extends from LibRAS.Interfaces.PartialTwoPortTransport.
Information
This very simple model provides a pressure drop which is proportional to the flowrate and to the opening input, without computing any fluid property. It can be used for testing purposes, when
a simple model of a variable pressure loss is needed.
A medium model must be nevertheless be specified, so that the fluid ports can be connected to other components using the same medium model.
The model is adiabatic (no heat losses to the ambient) and neglects changes in kinetic energy from the inlet to the outlet.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Medium.MassFlowRate | m_flow_nominal | Nominal mass flowrate at full opening | |
| Modelica.Fluid.Types.HydraulicConductance | k | m_flow_nominal/dp_nominal | Hydraulic conductance at full opening |
| Nominal operating point | |||
| Modelica.SIunits.AbsolutePressure | dp_nominal | Nominal pressure drop at full opening | |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Blocks.Interfaces.RealInput | opening | =1: completely open, =0: completely closed |
Revisions
- 2 Nov 2005
by Francesco Casella:
Adapted from the ThermoPower library.